IPv6 : a sequence of ping6

ICMPv6, described in the IPv6 chapter of Computer Networking: Principles, Protocols and Practice is a companion protocol for IPv6 that is used for various functions including network debugging. ping6 is a popular debugging tool that allows to verify whether a remote host is up and running. For this, it sends an ICMPv6 Echo request that contains some information and waits for an ICMPv6 Echo reply.

Paste this command into your terminal:

The password to connect is

Reorder ICMPv6 messages

Can you reorder the packets that were captured while a host was using ping6 to verify the reachability of destination 2001:6a8:3081:1::2 ?

#	Length	Summary
0	48 bytes	`Internet Control Message Protocol v6`
1	48 bytes	`Internet Control Message Protocol v6`
2	48 bytes	`Internet Control Message Protocol v6`
3	48 bytes	`Internet Control Message Protocol v6`
4	48 bytes	`Internet Control Message Protocol v6`
5	48 bytes	`Internet Control Message Protocol v6`

0000  6006f53600103a3d  200106a830810001
0010  0000000000000002  200106a8308f0002
0020  48e995ae3a92922d  8100561c3a830004

0000  `.õ6..:= ..¨0...
0010  ........ ..¨0...
0020  Hé.®:..-..V.:...

Internet Protocol Version 6, Src: 2001:6a8:3081:1::2, Dst: 2001:6a8:308f:2:48e9:95ae:3a92:922d
- 0110 .... = Version: 6
- .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
  - .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
  - .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
- .... .... .... 0110 1111 0101 0011 0110 = Flow Label: 0x6f536
- Payload Length: 16
- Next Header: ICMPv6 (58)
- Hop Limit: 61
- Source: 2001:6a8:3081:1::2
- Destination: 2001:6a8:308f:2:48e9:95ae:3a92:922d
Internet Control Message Protocol v6
- Type: Echo (ping) reply (129)
- Code: 0
- Checksum: 0x561c [correct]
- Identifier: 0x3a83
- Sequence: 4

0000  6006f53600103a40  200106a8308f0002
0010  48e995ae3a92922d  200106a830810001
0020  0000000000000002  8000697b3a830003

0000  `.õ6..:@ ..¨0...
0010  Hé.®:..- ..¨0...
0020  ..........i{:...

Internet Protocol Version 6, Src: 2001:6a8:308f:2:48e9:95ae:3a92:922d, Dst: 2001:6a8:3081:1::2
- 0110 .... = Version: 6
- .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
  - .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
  - .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
- .... .... .... 0110 1111 0101 0011 0110 = Flow Label: 0x6f536
- Payload Length: 16
- Next Header: ICMPv6 (58)
- Hop Limit: 64
- Source: 2001:6a8:308f:2:48e9:95ae:3a92:922d
- Destination: 2001:6a8:3081:1::2
Internet Control Message Protocol v6
- Type: Echo (ping) request (128)
- Code: 0
- Checksum: 0x697b [correct]
- Identifier: 0x3a83
- Sequence: 3

0000  6006f53600103a40  200106a8308f0002
0010  48e995ae3a92922d  200106a830810001
0020  0000000000000002  8000571c3a830004

0000  `.õ6..:@ ..¨0...
0010  Hé.®:..- ..¨0...
0020  ..........W.:...

Internet Protocol Version 6, Src: 2001:6a8:308f:2:48e9:95ae:3a92:922d, Dst: 2001:6a8:3081:1::2
- 0110 .... = Version: 6
- .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
  - .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
  - .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
- .... .... .... 0110 1111 0101 0011 0110 = Flow Label: 0x6f536
- Payload Length: 16
- Next Header: ICMPv6 (58)
- Hop Limit: 64
- Source: 2001:6a8:308f:2:48e9:95ae:3a92:922d
- Destination: 2001:6a8:3081:1::2
Internet Control Message Protocol v6
- Type: Echo (ping) request (128)
- Code: 0
- Checksum: 0x571c [correct]
- Identifier: 0x3a83
- Sequence: 4

0000  6006f53600103a3d  200106a830810001
0010  0000000000000002  200106a8308f0002
0020  48e995ae3a92922d  810072593a830002

0000  `.õ6..:= ..¨0...
0010  ........ ..¨0...
0020  Hé.®:..-..rY:...

Internet Protocol Version 6, Src: 2001:6a8:3081:1::2, Dst: 2001:6a8:308f:2:48e9:95ae:3a92:922d
- 0110 .... = Version: 6
- .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
  - .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
  - .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
- .... .... .... 0110 1111 0101 0011 0110 = Flow Label: 0x6f536
- Payload Length: 16
- Next Header: ICMPv6 (58)
- Hop Limit: 61
- Source: 2001:6a8:3081:1::2
- Destination: 2001:6a8:308f:2:48e9:95ae:3a92:922d
Internet Control Message Protocol v6
- Type: Echo (ping) reply (129)
- Code: 0
- Checksum: 0x7259 [correct]
- Identifier: 0x3a83
- Sequence: 2

0000  6006f53600103a3d  200106a830810001
0010  0000000000000002  200106a8308f0002
0020  48e995ae3a92922d  8100687b3a830003

0000  `.õ6..:= ..¨0...
0010  ........ ..¨0...
0020  Hé.®:..-..h{:...

Internet Protocol Version 6, Src: 2001:6a8:3081:1::2, Dst: 2001:6a8:308f:2:48e9:95ae:3a92:922d
- 0110 .... = Version: 6
- .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
  - .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
  - .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
- .... .... .... 0110 1111 0101 0011 0110 = Flow Label: 0x6f536
- Payload Length: 16
- Next Header: ICMPv6 (58)
- Hop Limit: 61
- Source: 2001:6a8:3081:1::2
- Destination: 2001:6a8:308f:2:48e9:95ae:3a92:922d
Internet Control Message Protocol v6
- Type: Echo (ping) reply (129)
- Code: 0
- Checksum: 0x687b [correct]
- Identifier: 0x3a83
- Sequence: 3

0000  6006f53600103a40  200106a8308f0002
0010  48e995ae3a92922d  200106a830810001
0020  0000000000000002  800073593a830002

0000  `.õ6..:@ ..¨0...
0010  Hé.®:..- ..¨0...
0020  ..........sY:...

Internet Protocol Version 6, Src: 2001:6a8:308f:2:48e9:95ae:3a92:922d, Dst: 2001:6a8:3081:1::2
- 0110 .... = Version: 6
- .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
  - .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
  - .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
- .... .... .... 0110 1111 0101 0011 0110 = Flow Label: 0x6f536
- Payload Length: 16
- Next Header: ICMPv6 (58)
- Hop Limit: 64
- Source: 2001:6a8:308f:2:48e9:95ae:3a92:922d
- Destination: 2001:6a8:3081:1::2
Internet Control Message Protocol v6
- Type: Echo (ping) request (128)
- Code: 0
- Checksum: 0x7359 [correct]
- Identifier: 0x3a83
- Sequence: 2

Author(s)	Olivier Bonaventure
Deadline	No deadline
Submission limit	No limitation
Category tags	ipv6

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